447 results about "Hydrogenation process" patented technology

The invention discloses application of a Ni-based reverse-phase catalyst in catalytic hydrogenation reaction of a nitro compound, nitro in the nitro compound is hydrogenated to reduce amino, the Ni-based reverse-phase catalyst is of an M / Ni reverse-phase structure, metal Ni for dissociating hydrogen serves as a carrier, nano metal M oxide is loaded on the carrier to serve as a loading phase, and reverse-phase interface active sites are constructed; wherein the metal M is one or two of Ce, Zr, Al, Y and Mg, and the mole fraction of the load phase metal M is 5-50% based on the mole fraction of all the metals in the catalyst being 100%. The preparation method of the catalyst is simple and easy to implement, the catalyst has a non-traditional supported reversed-phase structure, the activity of the catalyst is more excellent than that of a traditional supported catalyst when the catalyst is applied to the nitro-compound hydrogenation process, a traditional Raney nickel catalyst can be effectively replaced, a reaction system is clean and safe, repeatability is good, effective recycling can be achieved, and the catalyst is suitable for industrial production. The method is suitable for industrial production and has a good application prospect.

The invention discloses a hydrogen energy endurance supply regulation and control management system and method suitable for a hydrogen energy unmanned aerial vehicle, and belongs to the technical field of energy supply regulation and control. The method comprises the following steps: constructing a theoretical endurance mileage model, and calculating the theoretical endurance mileage which can be reached by the unmanned aerial vehicle in an ideal state after one hydrogen storage bottle is used up; collecting flight data of the unmanned aerial vehicle, inputting the flight data into a pre-trained artificial intelligence algorithm model, obtaining the endurance loss amount of the unmanned aerial vehicle in the current flight state, and further obtaining a first endurance mileage; a flight attitude combination used by the unmanned aerial vehicle in the flight process is obtained, and the predicted endurance mileage is calculated; based on the predicted endurance mileage of the unmanned aerial vehicle needing hydrogenation and the hydrogen capacity and the hydrogen concentration of the current remaining hydrogen storage cylinders, the unmanned aerial vehicle matched with the hydrogen concentration of the remaining hydrogen storage cylinders is screened out, and the hydrogen concentration of the hydrogen storage cylinders is preferentially distributed to the matched unmanned aerial vehicle; in the hydrogenation process, the required hydrogen energy capacity and the corresponding hydrogen concentration are calculated.

The invention discloses a hydrogenation safety control method and system based on adaptive robust filtering, and relates to the technical field of hydrogen energy, and the method comprises the steps: building a state prediction equation of a plurality of sensors in a hydrogenation process of a hydrogen refueling station based on Kalman filtering; constructing a filtering residual error based on the state prediction equation, and constructing a robust factor based on the filtering residual error; adjusting the initial observation noise covariance matrix of each sensor based on the robust factor to obtain an observation noise covariance matrix after robust adjustment; based on the health degree of each sensor, calculating a weight value corresponding to each sensor; dynamically adjusting the observation noise covariance matrix after the adversarial adjustment based on the weight value to obtain an observation noise covariance matrix after the weight adjustment; and based on the observation noise covariance matrix after weight adjustment and the state prediction equation, performing filtering updating on the state parameters of the plurality of sensors. The technical problem that in the prior art, the control precision and safety of a hydrogen refueling station are insufficient is solved.

The invention belongs to the technical field of functional sugar alcohol hydrogenation, and particularly relates to a system and a method for intelligently controlling a reaction kettle in a functional sugar alcohol hydrogenation process. Comprising a temperature sensor TT, a pressure sensor PT, a liquid level sensor LT, a hydrogen concentration sensor TZT and a spectrum sensor, and the sensor networks are arranged on a reaction kettle body, a feeding pipeline, a condenser and a hydrogen recovery device. The device is used for collecting temperature, pressure, liquid level and hydrogen concentration in the reaction kettle and spectral data of an outlet sugar alcohol product in real time. The control execution layer comprises a PLC (Programmable Logic Controller), a dynamic valve controller, temperature control equipment and a stirrer speed regulation module; and the dynamic valve controller is connected to the hydrogen supply pipeline and the feeding pump. The hydrogen flow, the temperature and the stirring speed are adjusted in real time through AI dynamic optimization, the sugar alcohol conversion rate is increased to 5%, and the conversion rate fluctuation range is reduced to + / -0.5%.

The invention relates to the technical field of waste tire recovery, in particular to a method and a system for preparing biological aviation fuel by hydrogenation of waste tire pyrolysis oil, a pretreatment unit is used for performing multi-stage filtration and preheating treatment on the waste tire pyrolysis oil; the hydrogenation reaction unit is used for carrying out hydrogenation reaction and shallow cracking reaction on the pretreated waste tire pyrolysis oil; the separation and purification unit comprises a hot high-pressure separator, a dechlorination reactor, a cold high-pressure separator, a hot low-pressure separator and a cold low-pressure separator, and is used for carrying out dechlorination reaction and gas-oil-water separation treatment on a product of the shallow cracking reaction; the circulating hydrogen unit is used for providing mixed hydrogen for the system; and the fractionation unit is used for fractionating the product separated by the separation and purification unit to obtain the biological aviation fuel. According to the method, the waste tire pyrolysis oil is converted into the biological aviation fuel by adopting a series hydrogenation process, so that the problem of waste tire treatment is solved, and high-value utilization of resources is also realized.

The invention discloses a Ce-MOF derived multi-metal oxide / ZSM-5-based composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of aviation kerosene preparation. The H-ZSM-5 molecular sieve is synthesized by adopting a hydrothermal method, and Ce-MOF is grown on the surface of the H-ZSM-5 molecular sieve in situ. The high specific surface area, developed pore structure and abundant unsaturated sites of the Ce-MOF material are utilized to realize efficient loading of various active metals. And drying and calcining to obtain the Ce-MOF derived multi-metal oxide / ZSM-5 composite catalyst with a stable structure. Rich oxygen vacancies and active sites can efficiently activate CO2 molecules and promote the hydrogenation process of the CO2 molecules and H2 to generate a key methanol intermediate; accurate carbon chain growth regulation coupling effect can be performed on the methanol intermediate, and the methanol intermediate is quickly and effectively converted. The catalyst prepared by the method provided by the invention has a regular pore structure and suitable acidic sites, and on the basis of the cage control shape selective catalysis principle of the H-ZSM-5 molecular sieve, the per-pass conversion rate of CO2 exceeds 25%, the selectivity of aviation kerosene components in hydrocarbon products reaches 70.5%, and the generation of methane by-products is effectively inhibited.

The invention discloses a green method for synthesizing hexamethylenediamine, which comprises the following steps: by taking adiponitrile and ethanol as solvents as raw materials and taking a porous cobalt-based catalyst and a solid base catalyst which are mixed according to a certain ratio as catalysts, reacting to obtain hexamethylenediamine at the reaction temperature of 70-90 DEG C under the reaction pressure of 2-5MPa H2 and the stirring rotating speed of 500-1000rpm. In the hydrogenation process, the two catalysts are mixed and added according to a certain proportion, and efficient conversion of adiponitrile and high selectivity of hexamethylenediamine can be realized under mild conditions. The catalyst used in the method is simple in preparation process, low in cost and easy to recover, the hexamethylenediamine synthesis process is green, and good economic benefits and application prospects are embodied. The method provided by the invention solves the problem that in the traditional process of synthesizing hexamethylenediamine through adiponitrile hydrogenation, inorganic alkali, such as sodium hydroxide, ammonia water and other strong corrosive additives, needs to be added, so that the conversion efficiency and selectivity are improved, the requirement on equipment is reduced, and meanwhile, the energy consumption of later separation is reduced.

The invention provides a temperature accurate control and flow state optimization method for replacing dimethyl disulfide with sulfur in a coal tar hydrogenation process, which comprises the following steps: after acquiring a blockage risk distribution diagram, deploying a flow sensor and a pressure sensor at key nodes of a pipeline in combination with real-time monitoring capability, and collecting dynamic data of a sulfur flow state; flow stability parameters are obtained; according to the fluctuation amplitude, adjusted sulfur flow state data are obtained, the flow velocity and viscosity change of sulfur in the pipeline are calculated through fluid mechanics simulation, and the flow state optimization degree is determined; after a process suitability evaluation result is obtained, the operation cost and the economic benefit improvement range of the sulfur substitution scheme are calculated in combination with a cost accounting model, and the cost control effect is judged by comparing the reference cost of dimethyl disulfide; through a cost control effect, a time sequence prediction algorithm is adopted to analyze sustainability of temperature control and flow state optimization in long-term operation, and a comprehensive optimization scheme of production process stability and economy is obtained.

The invention discloses a catalyst for preparing cyclohexanone by cyclohexanol dehydrogenation coupled phenol hydrogenation, the catalyst has a composite metal hydrotalcite structure, the metal components comprise ruthenium, magnesium and aluminum, the metal components are uniformly dispersed in hydrotalcite, and the ruthenium, the magnesium and the aluminum respectively account for 1-5wt%, 10-30wt% and 1-10wt% of the total mass of the catalyst. The acid-base property, the specific surface area and the pore structure of the catalyst are optimized by adjusting the ratio of magnesium to aluminum, so that the dispersion of ruthenium is improved, the interaction between ruthenium and a hydrotalcite carrier is increased, and the synergistic effect of all the element components enables active centers in cyclohexanol dehydrogenation, hydrogen transfer and phenol hydrogenation processes to be efficiently combined together, so that the catalytic activity of the catalyst is improved. Rich alkaline sites are generated in the catalyst, the dehydration side reaction of cyclohexanol can be effectively inhibited, meanwhile, the selectivity of cyclohexanone prepared through phenol hydrogenation is improved, it is ensured that the phenol hydrogenation reaction and the cyclohexanol dehydrogenation reaction can be effectively coupled, and cyclohexanone is efficiently prepared.

The application provides a continuous hydrogenation-isomerization method capable of meeting the treatment requirements of biological oils, especially waste oils, using a homogeneous hydrogenation process with strong adaptability to raw materials as a raw material pretreatment process, and matching a high-activity nanometer transition metal sulfide catalyst. On this basis, a catalytic distillation process is used for selective cracking of long-chain alkanes to improve the yield of medium and long-chain alkanes; an ultramicro flow hydrogen gas mixer and a reduced non-noble metal hydrogenation-isomerization catalyst are used to reduce the hydrogen / oil ratio and the energy consumption of the circulating hydrogen system, and to reduce the production cost of the catalyst, so as to finally realize efficient and low-carbon conversion of waste oils, and low-cost and high-selectivity preparation of biological aviation kerosene.

A continuous process includes supplying, to a hydrogen production unit, an energy source in the form of mechanical energy or electrical energy produced from thermal energy generated in a hydrogenation process in a hydrogenation reactor unit, and flowing a light hydrocarbon feed stream into the hydrogen production unit in the presence of a catalyst to produce a hydrogen gas enriched stream using the energy source.

The present invention is a method for removing sulfur from liquid hydrocarbon feedstocks and for performing hydrogenation reactions in sulfur-contaminated feedstocks, including the hydrogenation of naphthalene in the presence of sulfur compounds, using catalysts or adsorbents comprising metal oxide nanowires decorated with reduced catalytically-active metal particles. In a preferred embodiment, the adsorbent comprises zinc oxide nanowires decorated with catalytically-active metals selected from nickel, cobalt, molybdenum, platinum, palladium, copper, oxides thereof, alloys thereof, and combinations thereof. In some embodiments, the sulfur is removed through a desulfurization process without an external hydrogen supply. The process is effective for the removal of sulfur from diesel fuels and liquid fuel streams, and for deep desulfurization of natural gas streams. The process is also effective for the selective hydrogenation of naphthalene to tetralin in the presence of sulfur compounds.

The invention discloses an ionic liquid modified supported metal oxide and a preparation method and application thereof, the supported metal oxide takes a metal oxide as a carrier, platinum is supported on the metal oxide, and ionic liquid is electrostatically adsorbed on the metal oxide. According to the invention, the ionic liquid is used as an organic ligand to modify the platinum-loaded metal oxide, and the ionic liquid is used as a catalyst to realize the high activity of generating 1, 2-pentanediol in the selective hydrogenation process of furfuryl alcohol. Specifically, the selectivity of 1, 2-pentanediol can reach 76.8%, and compared with an original platinum-loaded metal oxide catalyst, the activity of the catalyst can be maximally improved by 491.2%.

The invention discloses a high-silicon crude benzene hydrogenation process which comprises the following steps: firstly, separating a raw material crude benzene into a crude benzene component I and a crude benzene component II, sequentially carrying out first-stage hydrogenation on the crude benzene component I to remove unsaturated substances such as styrene and diolefin, and carrying out second-stage hydrogenation on the crude benzene component I to remove silicon-containing compounds and residual unsaturated substances such as styrene and diolefin; and mixing with a crude benzene component II, and carrying out third-stage hydrogenation to remove impurities such as sulfur, nitrogen and the like. According to the distribution of the content of styrene and silicon in the crude benzene, styrene and silicon in the crude benzene are enriched in the crude benzene component I through distillation separation, and the crude benzene component II is removed, so that the hydrogenation styrene removal and hydrogenation desilicication reactions of the crude benzene component I are easier to carry out, meanwhile, the removal of silicon-containing compounds is further promoted through the addition of ethylenediamine, and the yield of the crude benzene is improved. The desiliconization activity and precision of second-stage hydrogenation are improved, and the problem of rapid deactivation of the catalyst caused by silicon poisoning in high-silicon crude benzene hydrogenation is effectively solved.

The invention provides a green hydrogen coupling hydrogenation process on-line agent model auxiliary multi-objective optimization method, which comprises the following steps: aiming at green hydrogen-grey hydrogen mixing fluctuation in a green hydrogen coupling hydrogenation process, constructing an economic and carbon emission reduction multi-objective operation parameter optimization problem, carrying out sensitivity analysis on operation parameters, and obtaining to-be-optimized operation parameters and a value range of the to-be-optimized operation parameters; the method comprises the following steps: establishing a first principle model for a hydrogenation process, performing Latin hypercube sampling, and establishing an offline proxy model by adopting Gaussian process regression; under the condition of mixed hydrogen fluctuation, an initial online agent model is generated based on the Gaussian process, the economic and carbon emission reduction multi-objective optimization problem is solved by adopting a rapid non-dominated sorting optimization method, and the online agent model is updated periodically. According to the method, the investment cost and the carbon emission reduction benefit are both considered, and multi-target balance optimization of the economic benefit and the carbon emission reduction under frequent fluctuation of green hydrogen-grey hydrogen mixing is realized.

The present invention relates to a method for achieving efficient electrocatalytic hydrogenation using a metal-free heterocyclic molecular catalyst. The method comprises using a five-membered or six-membered heterocyclic organic compound as the metal-free molecular catalyst, assembling an electrolytic cell using a gas diffusion electrode loaded with the metal-free molecular catalyst as the cathode and a corresponding anode, and an anion exchange membrane (or proton exchange membrane) as the cathode and anode separator, to perform the electrocatalytic semi-hydrogenation of alkynes. The method achieves activity and selectivity comparable to or even exceeding that of conventional metal catalysts during the electrocatalytic hydrogenation process.

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a carrier and active metal, the carrier is an aluminum oxide core wrapped by a carbon shell, the active metal is Mo and Ni, and on the basis of the weight of the catalyst, the content of MoO3 is 7.5 wt%-15.5 wt%, the content of NiO is 1.5 wt%-4.5 wt%, the content of carbon is 20 wt%-45 wt%, and the content of aluminum oxide is 35 wt%-70 wt%; and the ratio delta 1 of the content of the active metal in the shell layer to the content of the active metal in the core layer is 0.25: 1-0.75: 1. The preparation method comprises the following steps: (1) preparing active metal modified flour; (2) preparing active metal modified pseudo-boehmite microspheres; and (3) rolling the active metal modified flour and the active metal modified pseudo-boehmite microspheres for molding, then carrying out heat treatment, drying and roasting to obtain the hydrogenation catalyst. The catalyst disclosed by the invention has relatively high metal impurity capacity and relatively high Ca, Fe, Ni and V removal capacity, and is suitable for being used as a hydrogenation protection catalyst and a hydrodemetallization catalyst in a residual oil hydrogenation process.

The utility model belongs to the technical field of coal tar hydrogenation process, and relates to a sealing gas conveying system for sealing a circulating hydrogen compressor, which comprises a conveying pipeline and heating equipment, the conveying pipeline is connected with the outlet end of the compressor and used for conveying sealing gas. The heating device is arranged on the conveying pipeline and used for heating the sealing gas. According to the utility model, the process gas at the outlet end of the compressor is heated through the additionally arranged heating equipment, so that the process gas can be conveniently heated to the required temperature to serve as sealing gas, the load of the compressor does not need to be increased, unnecessary energy consumption of the compressor is avoided, and in addition, in the actual operation process, the energy consumption is reduced. The load of the compressor can be reduced according to actual process requirements, so that the process gas temperature at the outlet end of the compressor is reduced, and energy conservation and consumption reduction of the compressor are realized.

The invention discloses a cold hydrogenation quench tower energy recovery system and an operation mode, and the system comprises a quench tower, a vaporizer, a first-stage heat exchange system, a second-stage heat exchange system and a circulating water cooler, and layered energy recovery is realized through a three-stage cascade heat exchange structure: a high-temperature liquid-phase material discharged from a quench tower sequentially passes through a second-stage heat exchange system, a first-stage heat exchange system and a circulating water cooler to complete heat exchange, and meanwhile, a heating heat source is provided for silicon tetrachloride and hydrogen. Through the design of multiphase flow enhanced heat transfer, feed gas quality-divided heat exchange and tail liquid recovery, the system significantly improves the energy recovery rate, reduces steam consumption and raw material loss, enhances the operation stability of the system, and is suitable for efficient and energy-saving production of a cold hydrogenation process.

The present application relates to the technical fields of chemical synthesis, and discloses a kind of aviation kerosene production process and equipment, production process includes: carbon source gas, hydrogen, circulating gas is sent into main reactor reaction and obtains including hydrocarbon, methanol, CO, water and unreacted gas mixed component a;Mixed component a is sent into cascade reactor and is prepared to obtain including aviation kerosene component, light hydrocarbon component and water mixed component b, wherein light hydrocarbon component includes one or more of C2-C7 light hydrocarbon;Mixed component b is fractionally condensed to collect liquid phase and gas phase, and liquid phase is carried out three-phase separation to obtain aviation kerosene component, light hydrocarbon component and water respectively, aviation kerosene component is hydrotreated, fractionation to obtain aviation kerosene.The present application realizes the step-by-step control of reaction path in carbon source hydrogenation process through the synergistic effect of main reactor and cascade reactor, improves the selectivity of aviation kerosene target product, so that the obtained product meets the 3# aviation kerosene standard requirements in key indicators such as distillation range distribution, aromatic content and low temperature performance.

According to the multi-construction layered metal oxide and the application thereof in hydro-conversion of the polystyrene waste plastic pyrolytic oil, the prepared multi-construction layered metal oxide serves as a catalyst and is fully mixed with the polystyrene waste plastic pyrolytic oil after being pretreated, and then the mixture is transferred into a reaction kettle; after sealing, filling hydrogen into the reaction kettle, controlling the reaction temperature to be 90-100 DEG C, and stirring to react for 6-12 hours; according to the invention, the multi-constructed NixAl-LDO is combined with the hydrogenation process, and the styrene conversion rate and ethylbenzene selectivity are improved by utilizing the combined action of the structural advantage of the multi-layer catalyst and the hydrogenation reaction.

This invention discloses a method for preparing ultra-high voltage converter transformer oil. The method uses the full fraction of high-temperature and medium-low temperature coal tar as raw material, employing a combined suspended-bed hydrogenation process. Through the same raw material and a single set of industrial equipment, continuous production of transformer oil base oil and aromatic oil is achieved. After the final addition of an antioxidant, the resulting transformer oil exhibits excellent anti-gas evolution properties, and its low-temperature performance and antioxidant properties are significantly superior to commercially available transformer oils. Furthermore, the method demonstrates strong adaptability to raw materials, flexible operation, and online catalyst addition in small quantities, resulting in improved overall performance of the prepared ultra-high voltage converter transformer oil. This invention provides an economical processing method for coal tar, which has relatively low byproduct utilization, and also develops a new raw material for the production of ultra-high voltage converter transformer oil.

The invention discloses a biomass sugar solution steam stripping-hydrogenation device and a biomass sugar hydrogenation process, the biomass sugar solution steam stripping-hydrogenation device comprises: a steam stripping reaction kettle, the top of the steam stripping reaction kettle is provided with a feed pipe, and the bottom of the steam stripping reaction kettle is provided with a hydrogen inlet pipe; the fixed bed hydrogenation reactor is communicated with the steam stripping reaction kettle; the cooler is communicated with the fixed bed hydrogenation reactor; and the gas-liquid separator is communicated with the cooler. According to the present invention, the steam stripping-hydrogenation process coupling is adopted to achieve the in-situ conversion of the heat sensitive saccharide derivative, the problems of difficult separation, easy heating coking and the like of the saccharide derivative are solved, and the hydrogen circulation, the heat coupling and the integration of the process process are provided to provide the continuous, high-selectivity and low-energy-efficiency new process for preparing the biomass energy and the chemical product.

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a carrier and active metal components, the carrier is a core-shell carrier, a core layer is alumina, a shell layer is alumina containing molybdenum carbide, and the active metal components comprise at least one of VIII group metal oxides and at least one of VIB group metal oxides. The catalyst can be used for hydrogenation of heavy oil, residual oil and the like, is especially suitable for a residual oil hydrogenation process, and realizes efficient hydrogenation.

This invention discloses a method for hydrotreating catalytic cracking slurry. A fixed-bed hydrotreating process is employed, comprising: in the presence of hydrogen, the catalytic cracking slurry sequentially contacts a hydrotreating protectant, a hydrotreating transition catalyst, and a hydrodesulfurization catalyst to undergo a hydrotreating reaction, yielding hydrotreated oil. The hydrotreating protectant comprises an alumina support with a most probable pore size of 40–100 nm, molybdenum oxide, and cobalt oxide. The hydrotreating transition catalyst comprises an alumina support containing additives and MoO3 and CoO. The support has a bimodal pore size distribution, with smaller pores concentrated in the 10–40 nm range and larger pores concentrated in the 150–400 nm range. This method eliminates the diffusion resistance during the adsorption and reaction of large molecules on the catalyst surface during the hydrotreating of catalytic cracking slurry, increases the capacity for more deposits such as coke, extends the operating cycle of the unit, and facilitates hydrodesulfurization and other reactions. It also increases the content of tricyclic and tetracyclic aromatics in the hydrotreated oil, making it a high-quality feedstock for needle coke production.

This invention relates to the field of SEBS preparation, specifically to a method for predicting the degree of hydrogenation of SEBS. The method utilizes the designed values ​​of the amount m of the main catalyst, the lithium / main catalyst molar ratio n, and the co-catalyst / main catalyst molar ratio X in the selective hydrogenation process of SBS gel polymerized by active lithium anion polymerization and the main catalyst and co-catalyst. Formulas 1 to 9 are then used to calculate and predict the degree of hydrogenation Y of the prepared SEBS. Formula 1: Y = 0.12 + 0.88 * X, Formula 2: Y = 0.19 + 0.81 * X, Formula 3: Y = 0.25 + 0.75 * X, Formula 4: Y = 0.17 + 0.83 * X, Formula 5: Y = 0.25 + 0.75 * X, Formula 6: Y = 0.31 + 0.69 * X, Formula 7: Y = 0.2 + 0.8 * X, Formula 8: Y = 0.32 + 0.68 * X, Formula 9: Y = 0.4 + 0.6 * X. This invention also includes a synthesis method for precisely controlling the degree of hydrogenation of SEBS using the aforementioned prediction method. The process described in this invention can predict the degree of hydrogenation of SEBS with high accuracy.

This invention relates to the field of rubber hydrogenation, and discloses a stirred tank reactor and its application in rubber hydrogenation, as well as a batch hydrogenation method for nitrile rubber. The stirred tank reactor includes a cylindrical body and a stirrer and hollow finger-shaped baffles placed inside the body. The stirrer includes a hollow stirring shaft and a stirring paddle mounted on the shaft. A hydrogen inlet is located at the top of the hollow stirring shaft, and an annular gas distributor is located at the bottom. The hollow finger-shaped baffles include a hollow straight tube and at least two short, downward-sloping straight tubes arranged along the bottom of the tube. The bottom of the hollow straight tube is connected to a hydrogen inlet pipe at the bottom of the cylindrical body. The multiple hollow finger-shaped baffles within the stirred tank reactor enable good dispersion and mixing of hydrogen in the rubber solution, and, together with the hollow stirring shaft and gas distributor, achieve a top-to-bottom self-circulation of hydrogen in the gas phase space within the reactor, thereby improving the hydrogenation efficiency of the rubber hydrogenation reaction.

The present invention discloses a method for preparing a bimetallic catalyst for an organic liquid hydrogen storage process. The method comprises the following steps: mixing a nickel salt, a cobalt salt, ethylenediaminetetramethylenephosphonic acid, alanine, and a certain amount of deionized water to obtain a uniform composite active metal precursor impregnation solution; mixing the solution with pseudo-boehmite powder, ethylene glycol, hydrazine hydrate, and a dispersant and ultrasonically dispersing the solution to obtain a suspended fluid; then reducing the active metal component, adding a binder to the obtained semi-dry and semi-wet material, kneading the mixture, and extruding it into strips. Finally, drying the mixture to remove moisture and impurities, thereby obtaining a supported non-precious bimetallic cobalt-nickel hydrogenation catalyst for use in an organic liquid hydrogen storage process. The present invention obtains a supported non-precious bimetallic cobalt-nickel catalyst by adopting a suitable preparation method, which not only improves the activity of non-precious monometallic catalysts in the organic liquid hydrogenation process, but also avoids the high cost problem faced by using precious metal catalysts.

The present invention relates to the field of biofuel production, and discloses a method for producing biodiesel fractions from oil-based raw materials. The method includes: under the presence of hydrogen, subjecting the oil-based raw materials to a first hydrotreating and heat exchange treatment to obtain a hydrotreating effluent I; subjecting the hydrotreating effluent I to a second hydrotreating to obtain a hydrotreating effluent II; performing gas-liquid separation on the hydrotreating effluent II to obtain liquid hydrocarbons, water, and a gas stream; subjecting at least part of the liquid hydrocarbons to hydroisomerization reaction and then performing separation to obtain diesel fractions. The method provided by the present invention completes the reactions with fast reaction rates and large heat releases during the oil hydrogenation process in the reaction module, and at the same time, a plurality of heat exchange templates are added between the reaction modules. Without adopting a large amount of cold hydrogen and product circulation, the total temperature rise of the reaction system can still be controlled, resulting in low production energy consumption and qualified quality of the prepared biodiesel fractions.